Silver serpentine PU synthetic leather. Each shoe has a 2.5mm thick Ox Leather sole and also features a metal shank embedded from the heel part of the shoe all the way down to the forefoot. It measures: L120mm x W14mm x T1.4mm (length of the shank varies based on the length of the shoe). These are extremely flexible, lightweight and very comfortable. This style is excellent for amateur and professionals for Latin, Salsa, Samba, ChaChaCha, Rumba, Jive, wedding & party dancing and performance.